Straightening device



Sept. 24, 1929. A. RAUSCH smuenmnme DEVICE Filed June 14, 1926 INVENTOR.

BY I

ATTORNEY.

Patented Sept. 24, 1929 UNITED STA TES PATENT OFFICE ALBERT RAUSCH, OF DETROIT, MICHIGAN, ASSIGNOR TO AMERICAN TWIST DRILL AND TOOL COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN STRAIGHTENING DEVICE Application fil ed June 14,

The present invention. relates to straightening devices and particularly to devices for straightening short metal articles or pieces, such, for example, as drills and the like.

Among the objects of the invention is a device of the kind indicated which is economical to make and easy to adjust and opcrate.

Another object is a device of the kind which can be operated more rapidly and efficiently than with devices now used for the purpose.

Still other objects will readily appear to 15 those skilled in the art upon reference to the following description and drawings in which Fig. 1 is a plan view of the device.

Fig. 2 is section thereof on line 22 of 20 Fig. 1.

Fig. 3 is a side view of the base plate.

As indicated in the drawings, the device comprises a bed plate having a guideway 11. in which are adapted to slide three jaw 25 carrying members 12, 13, and 14 having the jaws 15 and 16. These members 12, 13,'and 14 are longitudinally bored and threaded for vthe reception of connecting and adjusting pins 17 which latter are provided at one end with ball sockets 18 and at the other end with slots 19 by means of which the pins may be turned to move the members 12, 18, and 14 thereon.

The ball sockets 18 cooperate with balls 20 forming one end of connecting rods 21, connecting the pins 17 to a crank-shaft and the three throws of the latter are arranged in one plane with the center one opposite the other two so that revolution of the shaft moves the one jaw carrying member 18 in an opposite direction to that of 'members 12 and 14.

This crank-shaft is mounted in one end of the bed'plate and provided with four bearings which are at 26, 27, 28, and 29. It is preferred to form the bed plate 10, as indicated in Figs. 1 and 3 with integral upstanding side walls and intermediate bearing supports 27 and 28, so as to maintain the shaft against bending when being 1926. serial No. 1 15,s15.

used for a straightening operation. Means, such as a hand lever 31 will be attached to the extended end of shaft 25 for turning the Opposite the space between the jaws and located'on the imaginary line are two holders for the work piece to be straightened. One of these holders consists of a barrel secured to one side of plate 10, having a spring pressed plunger 46 passing therethrough. The inner end of the plunger is provided with a suitably formed end 47 adapted to hold one end of the work piece, while the outer end of the plunger 46 is provided with a suitable grip piece 48. The other holder consists of a block 50, having a suitably shaped jaw piece 51 in alignment with and opposed to plunger end 47, which block is slidably mounted on a bracket 52 secured to the other side of plate 10 and fixed in adjusted position by means of a suitable screw 53. These two holders support the work between the jaws 15 and 16 while the latter are being moved toward or away from the work. Of course it is under stood that when the jaws 15 and 16 have gripped the work piece no other support is necessary. The holders aretherefore chief- [y centering devices.

Having now described the invention and the preferred form of embodiment thereof it should be under stood that the said invention is not to be limited to the specific details herein set forth but only by the scope of the claims which follow. 1

I claim r 1. A straightening device comprising a bed plate, a multiple throw crank-shaft mounted at one end thereof three jaw carrying members in a guideway in the other end thereof and adapted to be reciprocated by said shaft, the shaft being arranged to move some of the members in one direction and the others simultaneously in the opposite direction and means independent of said members and shaft for supporting the work betweenfsaidjaws.

2. A straightening device having a bed plate rovided with a guideway, a top plate provi ed With parallel slots located over said guideway, members slidable in said guideway and having jaws extending through said slots, said slots and jaws arranged with alternate jaws on either side of an intermediate line, means to support a work piece between said jaws and with its axis parallel to and above said line and means to cause all of said jaws simultaneously to approach or recede from said line to thereby grip and bend said work piece.

3. A straightening device having abed plate provided with a guideway, a top plate provided with parallel slots located over said guideway, members slidable in said guideway and having jaws extending through said slots, said slots, and jaws arranged with alternate jaws on either side of an intermediate line, means to adjust the position of a jaw with reference to said line, means to support a work piece between said jaws and with its axisparallel t0 and above said line and means to cause all of said jaws simultaneously-to approach or recede from said line to thereby grip and bend said work piece.

ALBERT RAUSCH. 

